Vietnam Oil & Gas Group, the state- owned oil producer known as PetroVietnam, resumed full production at the country's only refinery after shutting for planned maintenance.

The Dung Quat plant started operating commercially July 7 and returned to full capacity the following day, Nguyen Viet Thang, the deputy general director of Binh Son Refinery & Petrochemical Co., operator of the plant, said by phone on Monday.

The 130,000 barrel-a-day facility was shut from May 15 for repairs, Nguyen Hoai Giang, the general director of Binh Son Refinery, said at the time.